Do you prefer to trade with fixed risk/ratio?

It’s no rocket science that in order to succeed, it’s must to have good risk/reward ratio, but do you have fixed one? I mostly prefer to have around 3-5% risk/reward ratio and I like not to move from there, as that’s the only way one can build on. I trade with OctaFX broker and with them; I am never worried about anything since they help me massively. I love their 50% bonus on deposit, so that helps me with risk management accurately and brings so much profit.